Climate Change

The EPA's proposed Clean Power Plan drew praise from environmental advocates who have long hoped that Washington would finally take action to limit greenhouse gas emissions and address the threat of climate change. Criticism, perhaps predictably, came from a combination of climate change deniers, coal-reliant communities worried about potential job loss, and business interests bemoaning possible higher energy costs.

Two weeks ago, Pope Francis said: "if we destroy Creation, in the end it will destroy us." Following a Vatican summit on sustainability convened by one of us that discussed the dangers of climate change and global warming, the Pope's stern warning asked all of us to be better stewards of nature. But many people wonder what they can do to join the fight against global warming beyond buying a Prius and installing solar panels in their homes.

Will the U.S. shale boom turn out to be a bust? The recent decline in oil prices has left some questioning whether it can be sustained.

Don’t expect the landmark U.S.-China climate change agreement to nudge the world’s rising thermostat downward much on its own, scientists say. While they hail it as a start, experts who study heat-trapping carbon dioxide don’t see the deal, announced Wednesday in Beijing, making significant progress without other countries joining in. ...

Does Elevated CO2 Alter Silica Uptake in Trees?

Paying attention to the twinned threats of climate change and species extinction requires ingenuity, cash, and nimble legal mechanisms. Two novel solutions—REDD+ (Reducing Emissions from Deforestation and Forest Degradation) and Biodiversity Offsetting—comprise potentially win-win solutions.

Nasa's Orbiting Carbon Observatory (OCO-2) has returned its first global maps of the greenhouse gas CO2. The satellite was sent up in July to help pinpoint the key locations on the Earth's surface where carbon dioxide is being emitted and absorbed. This should help scientists better understand how human activities are influencing the climate. The new maps contain only a few weeks of data in October and November, but demonstrate the promise of the mission.

The U.S. and other nations were applauding this weekend’s climate change agreement on Monday, but the deal’s difficult negotiations showed all too clearly the major hurdles that lie ahead as officials try to reach a much more sweeping pact next year in Paris. The 196 nations gathered in the Peruvian capital agreed that each country should offer a plan next year for reducing its own greenhouse gas pollution. In a major win for the U.S. position, developing nations like China and India are also encouraged under the deal to join richer countries in agreeing to make cuts.

Through greater reliance on renewable power and energy efficiency measures already required under the state’s progressive energy laws, Arizona can achieve mandatory emissions reduction targets more easily and cheaply than federal guidelines anticipate, according to a group of University of Arizona researchers. The group’s comments are in response to the Clean Power Plan, an EPA proposal to reduce the country’s use of coal-dominated electric power to curb climate-altering greenhouse gas emissions. ...